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scsi: qla2xxx: edif: Fix dropped IKE message

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This patch fixes IKE message being dropped due to error in processing Purex
IOCB and Continuation IOCBs.

Link: https://lore.kernel.org/r/20220713052045.10683-6-njavali@marvell.com
Fixes: fac2807946 ("scsi: qla2xxx: edif: Add extraction of auth_els from the wire")
Cc: stable@vger.kernel.org
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran 2022-07-12 22:20:40 -07:00 committed by Martin K. Petersen
parent b1f7071469
commit c019cd656e
1 changed files with 24 additions and 30 deletions
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54
drivers/scsi/qla2xxx/qla_isr.c
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@ -3720,12 +3720,11 @@ void qla24xx_nvme_ls4_iocb(struct scsi_qla_host *vha,
* Return: 0 all iocbs has arrived, xx- all iocbs have not arrived.
*/
static int qla_chk_cont_iocb_avail(struct scsi_qla_host *vha,
struct rsp_que *rsp, response_t *pkt)
struct rsp_que *rsp, response_t *pkt, u32 rsp_q_in)
{
int start_pkt_ring_index, end_pkt_ring_index, n_ring_index;
response_t *end_pkt;
int start_pkt_ring_index;
u32 iocb_cnt = 0;
int rc = 0;
u32 rsp_q_in;
if (pkt->entry_count == 1)
return rc;
@ -3736,34 +3735,18 @@ static int qla_chk_cont_iocb_avail(struct scsi_qla_host *vha,
else
start_pkt_ring_index = rsp->ring_index - 1;
if ((start_pkt_ring_index + pkt->entry_count) >= rsp->length)
end_pkt_ring_index = start_pkt_ring_index + pkt->entry_count -
rsp->length - 1;
if (rsp_q_in < start_pkt_ring_index)
/* q in ptr is wrapped */
iocb_cnt = rsp->length - start_pkt_ring_index + rsp_q_in;
else
end_pkt_ring_index = start_pkt_ring_index + pkt->entry_count - 1;
iocb_cnt = rsp_q_in - start_pkt_ring_index;
end_pkt = rsp->ring + end_pkt_ring_index;
/* next pkt = end_pkt + 1 */
n_ring_index = end_pkt_ring_index + 1;
if (n_ring_index >= rsp->length)
n_ring_index = 0;
rsp_q_in = rsp->qpair->use_shadow_reg ? *rsp->in_ptr :
rd_reg_dword(rsp->rsp_q_in);
/* rsp_q_in is either wrapped or pointing beyond endpkt */
if ((rsp_q_in < start_pkt_ring_index && rsp_q_in < n_ring_index) ||
rsp_q_in >= n_ring_index)
/* all IOCBs arrived. */
rc = 0;
else
if (iocb_cnt < pkt->entry_count)
rc = -EIO;
ql_dbg(ql_dbg_init + ql_dbg_verbose, vha, 0x5091,
"%s - ring %p pkt %p end pkt %p entry count %#x rsp_q_in %d rc %d\n",
__func__, rsp->ring, pkt, end_pkt, pkt->entry_count,
rsp_q_in, rc);
ql_dbg(ql_dbg_init, vha, 0x5091,
"%s - ring %p pkt %p entry count %d iocb_cnt %d rsp_q_in %d rc %d\n",
__func__, rsp->ring, pkt, pkt->entry_count, iocb_cnt, rsp_q_in, rc);
return rc;
}
@ -3780,7 +3763,7 @@ void qla24xx_process_response_queue(struct scsi_qla_host *vha,
struct qla_hw_data *ha = vha->hw;
struct purex_entry_24xx *purex_entry;
struct purex_item *pure_item;
u16 rsp_in = 0;
u16 rsp_in = 0, cur_ring_index;
int follow_inptr, is_shadow_hba;
if (!ha->flags.fw_started)
@ -3811,6 +3794,7 @@ void qla24xx_process_response_queue(struct scsi_qla_host *vha,
(!follow_inptr &&
rsp->ring_ptr->signature != RESPONSE_PROCESSED)) {
pkt = (struct sts_entry_24xx *)rsp->ring_ptr;
cur_ring_index = rsp->ring_index;
rsp->ring_index++;
if (rsp->ring_index == rsp->length) {
@ -3931,7 +3915,17 @@ process_err:
break;
case ELS_AUTH_ELS:
if (qla_chk_cont_iocb_avail(vha, rsp, (response_t *)pkt)) {
if (qla_chk_cont_iocb_avail(vha, rsp, (response_t *)pkt, rsp_in)) {
/*
* ring_ptr and ring_index were
* pre-incremented above. Reset them
* back to current. Wait for next
* interrupt with all IOCBs to arrive
* and re-process.
*/
rsp->ring_ptr = (response_t *)pkt;
rsp->ring_index = cur_ring_index;
ql_dbg(ql_dbg_init, vha, 0x5091,
"Defer processing ELS opcode %#x...\n",
purex_entry->els_frame_payload[3]);